(19)
(11) EP 1 058 007 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.12.2001 Bulletin 2001/50

(43) Date of publication A2:
06.12.2000 Bulletin 2000/49

(21) Application number: 00110434.8

(22) Date of filing: 16.05.2000
(51) International Patent Classification (IPC)7: F04C 2/10, F04C 15/00
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 03.06.1999 US 325271

(71) Applicant: EATON CORPORATION
Cleveland, Ohio 44114-2584 (US)

(72) Inventors:
  • Wenker, Wayne Bernard, Chief Engineer
    Eden Prairie, Minnesota 55347-1405 (US)
  • Barto, Michael Wayne, Product Engineer
    Shakopee, Minnesota 55379-3922 (US)
  • Yakimow, Scott Edward, Product Engineer
    Burnsville, Minnesota 55337-5706 (US)

(74) Representative: Schorer, Reinhard et al
Schwan Schwan Schorer Patentanwälte Elfenstrasse 32
81739 München
81739 München (DE)

   


(54) Gerotor motor and brake assembly


(57) An integral brake assembly for a gerotor motor of the type including valving (41) disposed forwardly of the gerotor gear set (15). Orbital and rotational movement of the gerotor star member (31) is transmitted to an output shaft (43) by a main drive shaft (51), which includes a rearwardly extending brake portion (107). The motor includes an endcap assembly (21) defining a brake chamber (73) into which the brake portion (107) extends. A cylindrical brake member (91) is disposed in the brake chamber (73), and includes a circular surface (109) for frictional engagement with a lock piston (75). The brake member (91) also includes a forward generally annular surface (115) for frictional engagement with either the gerotor gear set (15) or an adjacent wear plate (89). The invention at least reduces the need for expensive friction discs in order to achieve a desired level of brake torque, and also utilizes inherent friction in various brake parts for some of the required brake torque.






Search report